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第二相Ba_6Ti_(17)O_(40)形成动力学的研究 被引量：1

KINETICS OF SECOND PHASE Ba_6Ti_(17)O40 FORMATION
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摘要 本文对添加过量TiO_2的BaTiO_3中所形成的第二相Ba_6Ti_(17)O_(40)的动力学进行了高温X射线衍射的实验研究,得到在不同温度下的富钛相Ba_6Ti_(17)O_(40)形成时的反应曲线,计算了反应速率常数K和反应激活能Q,并对第二相形成机制和过量钛的影响进行了讨论。 Kinetics of second phase Ba6Ti17O40 formation in the mixture of BaTiO2 and excess TiO2 were studied by high-temperature X-ray diffraction method. The reaction curves were obtained at various temperatures for the formation of Ti-rich phase Ba6Ti17O40, and the reaction rate constant K and the activation energy Q were calculated. Finally, the mechanism of second phase Ba6Ti17O40 formation and the effect of excess TiO2 are discussed.
作者 胡金元
机构地区 华中理工大学机械工程二系
出处 《物理学报》 SCIE EI CAS CSCD 北大核心 1991年第9期1485-1491,共7页 Acta Physica Sinica
基金 国家自然科学基金
关键词 Ba6Ti17O40 半导体 陶瓷 动力学
分类号 TN304.82 [电子电信—物理电子学]
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同被引文献13

  • 1Park M B, Cho N H, Kim C D, et al. Phase transition and physical characteristics of nanograined Ba- TiO3 ceramics synthesized from surface - coated nan- opowders [ J ]. Journal of the American Ceramic Society, 2004, 87(3) :510 -512.
  • 2Baeten F, Derks B, Coppens W, et al. Barium titanate characterization by differential scanning calo- rimetry[J]. Journal of the European Ceramic Society, 2006, 26(4-5) :589-592.
  • 3Huibregtse E J ,Young D R. Triple hysteresis loops and the free - energy function in the vicinity of the 5℃ transition in BaTiO3 [ J]. Physical Review, 1956, 103:1705- 1711.
  • 4Yan M F. Microstructural control in the processing of electronic ceramics[ J ]. Materials Science and Engineering, 1981, 48(1) :53 -72.
  • 5Kishi H, Okino Y, Honda M, et al. Effect of MgO and rare - earth oxide on formation behavior of core - shell structure in BaTiO3 [ J ]. Japanese Journal of Applied Physics, 1997, 36(9B) :5954 -5957.
  • 6Hennings D , Rosenstein G. Temperature -stable dielectrics based on chemically inhomogeneous BaTiO3 [ J ]. Journal of the American Ceramic Society, 1984, 67(4) :249 -254.
  • 7Chazono H , Kishi H. Sintering characteristics in BaTiO3 - Nb2O5- Co3 O4 ternary system: I, electrical properties and microstructure[ J]. Journal of the American Ceramic Society, 1999, 82 (10) : 2689 -2697.
  • 8Chazono H , Kishi H. Sintering characteristics in the BaTiO3 -Nb2O5 - Ce3O4 ternary system: Ⅱ, stability of so -called core - shell'structure[ J]. Journal of the American Ceramic Society, 2000, 83(1) :101 -106.
  • 9Kagata H, Inoue T, Kato J, etal. Low- firn-e bis- muth - based dielectric ceramics for microwave use [ J ]. Japanese Journal of Applied Physics, 1992, 31 (9B) :3152 -3155.
  • 10Em V , Newnham R E. Effect of WO3 on dielectric properties of BaTiO3 Ceramics [ J ]. Journal of the American Ceramic Society, 1961,44(4) :199-199.

引证文献1

物理学报
1991年 第9期

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